#Caché

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InterSystems Caché is a multi-model DBMS and application server. See more details here.

Documentation.

Question Christopher Schaefer · Feb 18, 2019

I am currently working with someone who is in the process of moving an application written in Cache Object Script over to a Windows server. It was previously running on a Linux server so all of the paths are unix style paths. Is anyone aware of a way to have cache remap paths to different paths so this user won't have to go through all of the scripts and change them?

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Question Adrian Bourner · Feb 14, 2019

Hi Community,

I have a need to access the Lock Table to find the Process ID of the process that has a particular global node Locked. The process holding the lock could be on any one of four application servers.

Having identified the Process ID, I then need to interrogate the local variables for that process, to find an application User ID.

I can then inform the current user which of their colleagues has a particular record locked, preventing them from continuing with their work...

Are these things I can do under Caché? If so, how would I do so?

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Question Thembelani Mlalazi · Dec 3, 2018

I have an application which is distributed across maybe 5 servers since it has over a thousand users at a time we had an upgrade to the application last week and I had an integration build that uses the REST service (  ##class(%Net.HttpResponse) but since the upgrade the integration has not be able to communicate with the application tried testing my URL through Postman and all seems ok but if I test direct  I get a 500 error anything that I need to check on please or any advice on how to check what's going on. I have used SoapUI with 200 result so as postman and swagger

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Discussion Evgeny Shvarov · Feb 11, 2019

Hi guys!

Suppose you developed a tool, framework, library on InterSystems ObjectScript for InterSystems Data Platform, share it via Open Exchange and want people to install it. 

What is the best strategy if it is a library and supposed to be called from different namespaces?

Here are the following thoughts:

1. Tool's developer should be able to use globals to read/store data the tool needs.

2. Tool's consumer should be confident, that the thing he/she installs will not harm the application's data.

3. A tool should be callable from any application's namespace.

4. Tool's installation(in general) should not request manual security changes (e.g. grant the write access to IRISLIB) and %YourClass is not an option.

5. It's easy to uninstall the tool - just delete the namespace/database (maybe delete some web-apps too).

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Question Thembelani Mlalazi · Feb 14, 2019

Is there a way or can it be done to use conditional logic in sql like so

 Query Q1(formal as %String) As %SQLQuery [ Final ]
{
    
    SELECT patientnumber,ID, CASE
    WHEN ID = 50 THEN "The is 50"
    WHEN ID = 30 THEN "This is 30"
    ELSE "The quantity is under 30"
END FROM Audit.Table WHERE ID = :formal AND EndDate is null} 

}

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Question Thiago Zenaro · Oct 30, 2018

Hi community.

I'm trying to create a "setup" method to be called on a batch script but i'm getting the error <INVALID ARGUMENT> when I pass a string as an argument to this method.

The idea is to call the method with a folder as the parameter, for example:

##class(test.MyClass).MyMethod("D:\path\to\my\file.json")
 

My class (just for example)

Class test.MyClass

{
ClassMethod MyMethod(pFilePath)
{
Write pFilePath ,!
}
}

I'm using cmd as follows:

D:\>csession CACHE20172 -U %SYS ##class(test.MyClass).MyMethod(100)
100

If I use a number, It works, but any string value I get the error

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Question Nicki Vallentgoed · Jun 2, 2017

I've been wondering about some code that I have come across a lot over the years.

Let's assume I have class Cinema and class Film.
Conceptually the data in these classes are never really physically deleted but only flagged as such, due to business requirements.

What I find is that developers tend to create a 3rd class "CinemaFilms", in a child relationship to parent Cinema, with a reference to Film. Rather than a one-to-many between Cinema and Film. 

Class CinemaFilms
{

Relationship cinema As Cinema [ Cardinality = parent, Inverse = Films];
Property film As Film;
}
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Question Sergio Martinez · Feb 12, 2019

Suppose we need to store millions of values temporarily, that means, we don't care about them if we lose them but our application use them to get realtime information. Should I use Cachetemp or whatever other DB without journaling enabled? If answer is Cachetemp, shouldn't be a problem if we decide to scale using App Server + ECP? I'm not sure what would happen with the app logic in such architecture as I guess I couldn't map and share cachetemp...

Any idea/suggestion?

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Question Thomas Kelleher · Dec 21, 2018

We have a Cache database in Azure, and want to expose it as an OData source (link).

My first attempt was to use Microsoft's Visual Studio 2017 and Entity Framework to create the data models...but it seems as if EF and Cache don't work together.  (I do have those instructions from 2013, but they don't work.  (See other post. Best answer seems to be "migrate to IRIS 2019.1.")  

Is there any other form of OData support?

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Question Jiri Svoboda · Jan 20, 2019

Hi community,

I would like to ask how to correctly enforce SSL on all "developer traffic" -- that is Management portal and Studio connections -- on a Caché instance.

Given large developer permissions, I would like to eliminate all plaintext credentials on the wire.

Currently, we compile our own httpd with SSL support for Management portal, but this breaks Add-Ins for us, in particular the SOAP wizard. So I guess this is not the "canonical way".

Thanks for any suggestions

Jiri

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Question Pravin Barton · Sep 6, 2018

I'm using Caché as an OAuth authorization server and I want to accept the password credentials grant type. I've found that if I make an authorize request, the Caché authorization server requires some URL parameters that shouldn't be required in password grant (redirect_uri, state, scope, and response_type). If I include these parameters, it calls my DirectLogin() method instead of just calling ValidateUser() as I would expect from the docs. I have two questions:

1. Why does the authorize request fail without these additional parameters?

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Question Jimmy Christian · Feb 8, 2019

Hello ,

I have a class Method ClassMethod SearchOBXFlag(pSourceMsg As EnsLib.HL7.Message, Identifier As %String) As %String

How can i test this method from terminal or from portal or studio.  In Terminal i am not able to pass a HL7 message to the method since it terminates after segment terminator. It should be great if i can pass a local file with the hl7 message to the function instead.

Any help will be appreciated how to pass a hl7 message to this function inorder to test.

Thanks

Jimmy Christian.

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Article Robert Cemper · Feb 8, 2019 2m read

The Caché / Ensemble standard distribution contains in namespace SAMPLES
a nice example of a CSP page consuming WebService as a Client.
I have modified it not only to display the replies but to feed them back into a Global.
I used the classic Hyperevent to achieve this. The replies end up as a log in global^WSREPLY.
When there is no input anymore the page closes and goes away.

There are 2 versions with visible and hidden display during operation.
dc.WSCSP.reverseVerbose.cls and dc.WSCSP.reverseHidden.cls

The message to send is simply passed as a hash after the CSP_URL. (Mind URL encoding!)

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Article Robert Cemper · Feb 8, 2019 2m read

It will demonstrate the wide range that is openend by making use
of the power embedded in Node.js and its adapter to Caché, Ensemble, Health,..*
Node / JavaScript have wide reputation to work as a WebSocket client.
By using the Caché adapter it becomes easy to control it and to consume the results as a
Client for WebSocket Servers and to collect the replies in Caché, Ensemble, ..

I used node-v6.16.0-x64.msi and cache610.node as cache.node

You provide a Global for input:

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Question Laura Cavanaugh · Feb 5, 2019

Our development server is set up to automatically keep the .INT code of compiled classes and routines, but the live servers are set to not keep the .INT code.

I know how to set the system to keep this code ($SYSTEM.OBJ.SetQualifiers() ?)  but what are the ramifications of keeping this code on the live servers?  Is it just a space issue?  I always thought it was to keep the code more private.

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Question PILAR GUERRERO · Feb 6, 2019

Hi all!
I need to call an API that has the following characteristics:

  • Content-Type: application / x-www-form-urlencoded
  • Authorization: (with a "Bearer" token)

In the body the information is given through the form data.

I can not find documentation on how to make this call and how to get the answer (JSON).

Could you help with an example?

Thank you

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Question Colin McCudden · Feb 4, 2019

Hello, 

I am new to InsterSystems Cache - having a SQL Server background.  However I am dealing with a Third Party who use InterSystems Cache to hold some of our data.  To do some analysis I need to view a backup of the database.  They are prepared to send me a backup.

My question is - how can I view this backup ( would this be the CACHE.dat file?).

Do I effectively need to have an installation of CACHE on my machine to be able to view this?  Is it possible to view it from SQL Server?  

Any help would be appreciated.

Thanks

Colin

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Question Alex Kogan · Feb 1, 2019

Hello all,

I have an XSL question and I wanted to see if someone within a community can help me out.  

To Summarize: I am working with XSL documents, single and multi-pages.  
Inside my style sheet XML document, which is supporting my pages, everything on the page, including a headers, footers and the items are calculated 
based on the portrait measurements. 
Pages come up on the screen as portrait, but sometimes, depending on dynamic data are wide, they do not print properly in portrait.

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Question Stephen De Gabrielle · Feb 1, 2019

Hi,

I'm writing to an ODBC connection to a SQLserver database, and I seem to be sending the wrong data type to a date colum?

set tSC = ..Adapter.ExecuteUpdate(.intRows,sqlInsert,$ZDATETIME($NOW(),3,2), pRequest.ComposerName, [...])

I think  `$ZDATETIME($NOW(),3,2)` is ODBC datetime format: 

https://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=RCOS_fzdatetime#RCOS_fzdatetime_tformat

Do I have it wrong?

Stephen

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Question Alex Van Schoyck · Jan 31, 2019

Problem

I got a quick answer from this forum yesterday so I'm going to try my luck again today!  I've hit an error in another table when trying to extract through the Cache ODBC driver, but this one gives me less details and I'm struggling to pinpoint what might be causing the error.

The table I am trying to extract is called REF_TABLE_ONE.

Here's the Error:

[Cache Error: <<NOLINE>%0AmBx1^%sqlcq.PRD.2249>]
[Location: <ServerLoop - Query Fetch>]

Research/Trial & Error

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